1366 - Incorrect integer value: '' for column `abtecsho_shop`.`whos_online`.`customer_id` at row 1

insert into whos_online (customer_id, full_name, session_id, ip_address, time_entry, time_last_click, last_page_url) values ('', 'Guest', 'gu0n9qehdmu3d1lm80d7dnnkc2', '216.73.216.80', '1767184012', '1767184012', '/')

[XT SQL Error]